SpeedFactor is described as 'Use SpeedFactor to track your website. It’s simple and reliable. SpeedFactor uses a custom-tailored Simulated User Monitoring audit, testing for raw data related to pageload timing and loads your website including all its elements—exactly like your users load it'. There are more than 10 alternatives to SpeedFactor for SaaS, Online / Web-based, Android, iPhone and Self-Hosted solutions. The best alternative is Pingdom. It's not free, so if you're looking for a free alternative, you could try GTmetrix or wattspeed. Other great apps like SpeedFactor are Request Metrics (Paid), Lean20 Ping (Paid), Pingnik (Free) and MachMetrics (Paid).
Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your website as experienced by visitors.
Wattspeed is a free tool that generates snapshots - historical captures of your web pages that include Lighthouse scores, a list of technologies, W3C HTML validator results, DOM size, mixed content info, and more.
Unlimited monitors checked from multiple location every minute. Monitor any port or setup a "heartbeat" that works well for cron jobs or any service behind a firewall. Be alerted as soon as your service is offline via email or app integration.
Monitor your website, server, API, application, service and get notified if your resources have some problems with availability. Upzilla notifies you in Slack, Telegram, Messenger, or by email. Works also as a public status page with subscriptions.
Monitor your website for spelling errors, layout issues, security vulnerabilities and slow pages. PageWatch renders every page of your site in a real browser to catch any potential issues before they become problems.